LI,
Your view is probably not so different than the majority.
I'm sure if we asked the gas jockeys how often they get tipped the answer would be, "not often enough!". LOL
Like I said, I agree with you about most of the other professions that I see with tip cups that I don't feel should be there.
I just have a warm spot in my heart for these fuel jockeys since a long, long, long time ago in a land far, far away.............I, too, was a "petroleum engineer".
CZ